var d= new Date();
    function date(){
          y=d.getFullYear();
          mo=d.getMonth()+1;
          dd=d.getDate();
          day=d.getDay();
          h=d.getHours();  
         s=d.getSeconds();
          m=d.getMinutes();
          if(s<10){
            s='0'+s
          }else{
            s=s
          }
          if(m<10){
            m='0'+m
          }else{
            m=m;
          }
         
         switch(day){
          case 0:
            weekday= '星期日';
            break;
            case 1:
            weekday=  '星期一'
             break;
            case 2:
            weekday= '星期二'
             break;
            case 3:
            weekday= '星期三'
             break;
            case 4:
            weekday= '星期四'
             break;
            case 5:
            weekday= '星期五'
             break;
            case 6:
            weekday= '星期六'
             break;
            
         }
         return '今天是'+y+'年'+mo+'月'+dd+'日'+weekday+'<br><br>'+h+':'+m+':'+s
    }
       
     
        document.write(date())